package cn.tedu.sp11.fallback;

import cn.tedu.web.util.JsonResult;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.server.reactive.HttpHandler;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

@Component
public class ItemFB implements FallbackProvider {
    /**
     * 返回一个服务id,表示是针对这个服务的降级类
     * @return
     */
    @Override
    public String getRoute() {
        return "item-service";
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        //降级响应封装在Response对象中
        return new ClientHttpResponse(){


            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders h=new HttpHeaders();
                h.add("Content-Type", "application/json;charset=UTF-8");
                return h;
            }

            @Override
            public InputStream getBody() throws IOException {
                String json=JsonResult.ok().msg("转发调用商品服务失败").toString();
                return new ByteArrayInputStream(json.getBytes("UTF-8"));
            }

            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.OK;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.OK.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return null;
            }

            @Override
            public void close() {

            }
        };
    }
}
